Replacing The Power Supply Assembly - Lenovo THINKCENTRE M79 User Manual

• To complete the installation or replacement, go to "Completing the parts replacement" on page 106.

Replacing the power supply assembly

Attention: Do not open your computer or attempt any repair before reading and understanding the "Read
this first: Important safety information" on page v.
Although there are no moving parts in your computer after the power cord has been disconnected, the
following warnings are required for your safety and proper Underwriters Laboratories (UL) certification.
CAUTION:
Hazardous moving parts. Keep fingers and other body parts away.
CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.
Hazardous voltage, current, and energy levels are present inside any component that has this label
attached. There are no serviceable parts inside these components. If you suspect a problem with
one of these parts, contact a service technician.
To replace the power supply assembly, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See "Removing the computer cover" on page 69.
3. Disconnect the power supply assembly cables from the system board and all drives. See "Locating
parts on the system board" on page 6.
4. Release the power supply assembly cables from the cable clips and ties in the chassis.
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ThinkCentre M79 User Guide